you cant mix best with cheapest. low quality ones will cost less but dont be surprised if they come aprt soon.
with suspension, you are just asking for problems when you go cheap. Even cheapo-depot ones that claim they use premium materials, even things like Steel can be made differently and visually you cannot tell. Go with OEM suspension or good brand- names. Check things like Autozone, amazon.com to read reviews on folks already bought them. Good reviews = money well spent.
Search Ford Focus Questions
Ford Focus Experts
Related Models For Sale
Used Cars For Sale